angular.module('app', [])
    .run(function () {
        var source = {
            name: 'angular',
            version: '1.1.5'
        };
        var fn = function (arr) {
            return angular.copy(arr);
        };
        var arr = [1,2,3];
        var arr1 = fn(arr);
        arr1.push(4);
        console.log(arr);
    });